进程间传递Socket文件描述符-gb 50150-2016电气装置安装工程电气设备交接试验标准

11.11进程间传递Socket文件描述符问题You have multiple Python interpreter processes running and you want to pass an open file descriptor from one interpreter to the other. For instance, perhaps there is a server process that is responsible for receiving connections, but the actual servicing of clients is to be handled by a different interpreter.解决方案To pass a file descriptor between processes, you first need to connect the processes together. On Unix machines, you might use a Unix domain socket, whereas on Win‐ dows, you could use a named pipe. However, rather than deal with such low-level mechanics, it is often easier to use the multiprocessing module to set up such a connection. Once a connection is established, you can use the send_handle() and recv_handle() functions in multiprocessing.reduction to send file descriptors between processes. The following example illustrates the basics: import multiprocessing from multiprocessing.reduction import recv_handle, send_handle import socket def worker(in_p, out_p): out_p.close() while True: